The Holland Tunnel’s roadway reaches a maximum depth of about 93 feet (around 28 meters) below the Hudson River’s mean high-water level.

Basic facts

  • The tunnel’s lowest roadway point is about 93–93.4 feet below mean high water.
  • The tunnel ceiling is shallower, at about 72 feet below mean high water.

What “depth” means here

When people ask “how deep is the Holland Tunnel?” , they usually mean how far the roadway sits below the river surface, not how far it is below the riverbed. In everyday terms, you are driving roughly 9–10 stories below the water level at the deepest point.

Information gathered from public forums or data available on the internet and portrayed here.